Question

What is central nervous system??​

Answer 1

Explanation:

It is the complex of nerves tissue that controls the activities of body!!

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Answer 2

Answer:

The central nervous system consists of the brain and spinal cord. The brain plays a central role in the control of most bodily functions, including awareness, movements, sensations, thoughts, speech, and memory. Some reflex movements can occur via spinal cord pathways without the participation of brain structures. The spinal cord is connected to a section of the brain called the brainstem and runs through the spinal canal. Cranial nerves exit the brainstem. Nerve roots exit the spinal cord to both sides of the body. The spinal cord carries signals (messages) back and forth between the brain and the peripheral nerves.

• The CNS consists of the brain and spinal cord.
• The brain is the most complex organ in the body and uses 20 percent of the total oxygen we breathe in.
• The brain consists of an estimated 100 billion neurons, with each connected to thousands more.
• The brain can be divided into four main lobes: temporal, parietal, occipital and frontal.

The brain is roughly split into four lobes:

• Temporal lobe (green): important for processing sensory input and assigning it emotional meaning.

• It is also involved in laying down long-term memories. Some aspects of language perception are also housed here.

• Occipital lobe (purple): visual processing region of the brain, housing the visual cortex.

• Parietal lobe (yellow): the parietal lobe integrates sensory information including touch, spatial awareness, and navigation.

• Touch stimulation from the skin is ultimately sent to the parietal lobe. It also plays a part in language processing.

• Frontal lobe (pink): positioned at the front of the brain, the frontal lobe contains the majority of dopamine-sensitive neurons and is involved in attention, reward, short-term memory, motivation, and planning.

The spinal chord:

• The spinal cord, running almost the full length of the back, carries information between the brain and body, but also carries out other tasks.

• From the brainstem, where the spinal cord meets the brain, 31 spinal nerves enter the cord.

• Along its length, it connects with the nerves of the peripheral nervous system (PNS) that run in from the skin, muscles, and joints.

• Motor commands from the brain travel from the spine to the muscles and sensory information travels from the sensory tissues — such as the skin — toward the spinal cord and finally up to the brain.

• The spinal cord contains circuits that control certain reflexive responses, such as the involuntary movement your arm might make if your finger was to touch a flame.

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